Formal Deformation of Chow Groups
نویسندگان
چکیده
Especially notable here is Spencer Bloch’s semi-regularity paper [B]. The advantage of this approach is that one can use the full strength of the deformation theory of subvarieties. One might similarly ask whether there is a family of algebraic cycles {Zt}t∈B deforming Z; some first steps toward an infinitesimal theory for this problem were the subject of [G-G2]. A third possible context, which we will consider here, is to work in the Chow group. Thus, letting ξ ∈ CH(X) be the
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